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|Possible microphthalmia in a young racing homer.|
|Description||Pigeons hatch with tiny or no eyes.|
This mutation causes pigeons to hatch with very small eyes, or no eyes at all.
Microphthalmia is an autosomal recessive mutation. This means that both parents need to carry the mutant gene for it to express in the next generation. As a recessive mutation, it is possible for microphthalmia to be carried by a bird who does not visually express it.